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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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drelog drelog
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8 years ago
A geologist is working in an area of old volcanic rocks exposed by erosion.  He finds a large rock outcrop that contains flat lying gravels in the base of the outcrop.  These gravels are overlain by basalt that forms a series of layers representing flows.  The uppermost basalt lava flows have a dip of about 10 degrees to the west.  What does this outcrop record?
A) Basalt flows formed after gravels were deposited, covered the local terrain, and built a shield volcano with dips of about 10 degrees.
B) You can't tell anything about the history of this region from this outcrop.
C) Gravels were initially deposited in a river valley and a cinder cone was erupted, damming the valley, before a cinder cone formed.
D) Basalt flows formed above a series of gravels, filling a river valley.
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Earth Science

Earth Science


Edition: 14th
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PulsaPulsa
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8 years ago
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drelog Author
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#2
8 years ago
Exactly what I needed, exam is tomorrow!
ןnɟʎoɾ sʎɐʍן∀ Slight Smile
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#3
3 years ago
thank you
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